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KMID : 0948920170160020095
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Clinical Pain
2017 Volume.16 No. 2 p.95 ~ p.98
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Carpal Tunnel Syndrome Associated with the Anomalous Flexor Digitorum Superficialis Was Treated with Botulinum Toxin A Injection
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Jang Chang-Woong
Kim Hyoung-Seop
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Abstract
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The cases of anomalous flexor digitorum superficialis (FDS) are rare and asymptomatic in most cases. They may result in neurologic symptoms if there is tendon impingement under flexor retinaculum as often seen in patients with trigger finger at wrist level. In such cases, carpal tunnel syndrome (CTS) can be developed as a result. The anomalous FDS showed low attenuation at the carpal tunnel on ultra-sonography without tenosynovial swelling. Secondarily occurred CTS can be diagnosed by ultrasonography and magnetic resonance imaging. In the case of space occupying lesions, the treatment of choice is usually surgical removal of muscle mass or tumor with carpal tunnel release. However, in our case, we tried to reduce the compression of carpal tunnel by Botulinum toxin A injection directly into anomalous muscle. Through this effect, we expected to reduce the entrapment of median nerve and improve the symptoms. This approach has never been reported.
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KEYWORD
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Carpal tunnel syndrome, Flexor digitorum super-ficialis, Botulinum toxin A
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